package chuyentrung.racehorses.framework.impl;

import java.util.ArrayList;
import java.util.List;

import android.view.MotionEvent;
import android.view.View;
import chuyentrung.racehorses.framework.Input.TouchEvent;
import chuyentrung.racehorses.framework.impl.Pool.PoolObjectFactory;

public class MultiTouchHandler implements TouchHandler {
	private boolean[] isTouched = new boolean[20];
	private int[] touchX = new int[20];
	private int[] touchY = new int[20];
	private Pool<TouchEvent> touchEventPool;
	private List<TouchEvent> touchEvents = new ArrayList<TouchEvent>();
	private List<TouchEvent> touchEventsBuffer = new ArrayList<TouchEvent>();
	private float scaleX;
	private float scaleY;
	
	public MultiTouchHandler(View view, float scaleX, float scaleY){
		PoolObjectFactory<TouchEvent> factory = new PoolObjectFactory<TouchEvent>(){
			@Override
			public TouchEvent CreateObject() {
				// TODO Auto-generated method stub
				return new TouchEvent();
			}			
		};
		touchEventPool = new Pool<TouchEvent>(factory, 100);
		this.scaleX = scaleX;
		this.scaleY = scaleY;
		
		view.setOnTouchListener(this);				
	}

	@SuppressWarnings("deprecation")
	@Override
	public boolean onTouch(View v, MotionEvent event) {
		// TODO Auto-generated method stub
		synchronized (this){
			int action = event.getAction() & MotionEvent.ACTION_MASK;
			int pointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
			int pointerId = event.getPointerId(pointerIndex);
			TouchEvent touchEvent;
			
			switch (action) {
			case MotionEvent.ACTION_DOWN : 
			case MotionEvent.ACTION_POINTER_DOWN : 
				touchEvent = touchEventPool.newObject();
				touchEvent.type = TouchEvent.TOUCH_DOWN;
				touchEvent.pointer = pointerId;
				touchEvent.x = touchX[pointerId] = (int) (event.getX(pointerIndex) * scaleX);
				touchEvent.y = touchY[pointerId] = (int) (event.getY(pointerIndex) * scaleY);
				isTouched[pointerId] = true;
				touchEventsBuffer.add(touchEvent);
				break;
				
			case MotionEvent.ACTION_UP : 
			case MotionEvent.ACTION_POINTER_UP : 
			case MotionEvent.ACTION_CANCEL : 
				touchEvent = touchEventPool.newObject();
				touchEvent.type = TouchEvent.TOUCH_UP;
				touchEvent.pointer = pointerId;
				touchEvent.x = touchX[pointerId] = (int) (event.getX(pointerIndex) * scaleX);
				touchEvent.y = touchY[pointerId] = (int) (event.getY(pointerIndex) * scaleY);
				isTouched[pointerId] = false;
				touchEventsBuffer.add(touchEvent);
				break;
				
			case MotionEvent.ACTION_MOVE : 
				int pointerCount = event.getPointerCount();
				
				for (int i = 0; i < pointerCount; i++){
					pointerIndex = i;
					pointerId = event.getPointerId(pointerIndex);
					
					touchEvent = touchEventPool.newObject();
					touchEvent.type = TouchEvent.TOUCH_DRAGGED;
					touchEvent.pointer = pointerId;
					touchEvent.x = touchX[pointerId] = (int) (event.getX(pointerIndex) * scaleX);
					touchEvent.y = touchY[pointerId] = (int) (event.getY(pointerIndex) * scaleY);					
					touchEventsBuffer.add(touchEvent);					
				}
				break;
			}
		}
		return true;
	}

	@Override
	public boolean isTouchDown(int pointer) {
		// TODO Auto-generated method stub
		synchronized (this) {
			if (pointer < 0 || pointer >= 20)
				return false;
			else
				return isTouched[pointer];
		}
	}

	@Override
	public int getTouchX(int pointer) {
		// TODO Auto-generated method stub
		synchronized (this){
			if (pointer < 0 || pointer >= 20)
				return 0;
			else 
				return touchX[pointer];
		}
	}

	@Override
	public int getTouchY(int pointer) {
		// TODO Auto-generated method stub
		synchronized (this){
			if (pointer < 0 || pointer >= 20)
				return 0;
			else 
				return touchY[pointer];
		}
	}

	@Override
	public List<TouchEvent> getTouchEvents() {
		// TODO Auto-generated method stub
		synchronized (this){
			int len = touchEvents.size();
			
			for (int i = 0; i < len; i++)
				touchEventPool.free(touchEvents.get(i));
			touchEvents.clear();
			touchEvents.addAll(touchEventsBuffer);
			touchEventsBuffer.clear();
			
			return touchEvents;
		}
	}

}
